摘要:
An electrically conductive adhesive composition effective for repairing discontinuities in the electrically conducting metal lines of rear window defoggers is disclosed. The composition comprises (a) an acrylic ester polymer resin (b) a metallic pigment and (c) an organic pigment.The composition is applied as a solid solution to the interrupted section of the metal line to bridge the gap in the line and the solvent is evaporated leaving an electrically conductive bridging layer which restores electrical flow to the line. The T.sub.g of the acrylic ester polymer resin should be such that the composition does not run, sag or otherwise lose its structural integrity when the metal line is heated to an operating temperature.
摘要:
A composition comprising: a) one or more isocyanate functional prepolymers; and b) one or more compounds containing one or more hydroperoxide groups; wherein components a) and b) are kept separate until cure is desired. The composition can be used in the form of a two part adhesive.
摘要:
The present invention is a composition comprising: a) one or more isocyanate functional prepolymers; b) one or more compounds containing a cycloaliphatic tertiary amine; c) one or more compounds containing a peroxide group; and d) one or more acrylate containing components. The system can be used in the form of a two part adhesive or in the form of a one part adhesive and an activator adapted to be applied to the surface of one or more of the substrates to which the adhesive is to be bonded.
摘要:
Epoxy adhesive compositions contain a heat-activatable catalyst. The heat-activatable catalyst includes a tertiary amine catalyst and a novolac resin that has a weight average molecular weight of at least 3000. One-component epoxy adhesive formulations that contain the heat-activatable catalyst have unexpectedly good storage stability.
摘要:
A heat-curable structural adhesive includes a non-rubber-modified epoxy resin, a reaction product of a carboxyl- or amine-terminated butadiene polymer or copolymer and a bisphenol F-based epoxy resin, a elastomeric toughener containing capped isocyanate groups, one or more epoxy curing agents a moisture scavenger and a heat activatable catalyst comprising a mixture of a solid or liquid tertiary amine compound that has a boiling temperature of at least 130° C. and a novolac resin. The structural adhesive develops excellent bonding properties when cured at moderate temperatures, especially from 120 to 170° C., and in addition performs very well in environmental aging stress testing. The adhesive is particularly good for bonding aluminum to another metal, or bonding aluminum to aluminum.
摘要:
The present invention provides low polyphenols (such as bisphenol A) tougheners for epoxy adhesives. The tougheners, and adhesives comprising the tougheners exhibit enhanced viscosity stability, e.g., compared to tougheners prepared from higher amounts of bisphenol A (and epoxy adhesives comprising them).
摘要:
The invention is a two part polymerizable composition comprising in one part an organoboron compound capable of forming free radical generating species amine complex and in the second part one or more compounds capable of free radical polymerization and a cure accelerator comprising a) at least one compound containing a quinone structure or b) at least one compound containing at least one aromatic ring and one or more, preferably two substituents on the aromatic ring selected from hydroxyl, ether and both, where there are two substituents they are located either ortho or para with respect to one another and a peroxide containing compound. The second part may further contain an agent capable of causing the organoboron compound to form free radical generating species upon contacting the two parts. The first part may further comprises one or more compounds capable of free radical polymerization. This facilitates formulating compositions that have commercially desirable volumetric ratios of the two parts. Adhesive compositions of the present formulation provide excellent adhesion to low surface energy substrates, such as plastics.
摘要:
The invention is polymerizable compositions comprising in one part an organoboron compound capable of forming a free radical generating species and a stabilizing amount of one or more compounds comprising a dihydrocarbyl hydroxyl amine, an alicyclic hydroxyl amine, or a nitrile oxide of a dihydrocarbyl hydroxyl amine or an alicyclic hydroxyl amine, and in the second part one or more compounds capable of free radical polymerization.
摘要:
Monofunctional polyfluorooxetane oligomers, polymers, and copolymers are prepared by the cationic polymerization of fluorooxetane monomers with a monoalcohol. In addition to serving as an initiator, the monoalcohol can also serve as a solvent for the fluorooxetane or other monomers to produce oligomers, polymers, or copolymers having low cyclic content. Suitable comonomers generally include various cyclic ethers. The polyfluorooxetane oligomer, polymer, or copolymer having a single hydroxyl end group can be functionalized with a variety of compounds so as to yield a functional end group such as an acrylate, a methacrylate, an allylic, an amine, etc., with the functionalized oligomer or polymer being suitable for use in radiation curable or thermal curable coating compositions. These functionalized polymers can be copolymerized and cured to provide improvements in wetting and surface properties.
摘要:
A composition comprising: a) one or more isocyanate functional prepolymers; and b) one or more compounds containing one or more hydroperoxide groups; wherein components a) and b) are kept separate until cure is desired. The composition can be used in the form of a two part adhesive.